Effect of dietary iodine on thyroid hormones and energy blood metabolites in lactating goats

Abstract

Aim of this work was to evaluate if long-term dietary supplementation of potassium iodide (KI) to dairy goats can influence metabolic and hormonal parameters. Thirty Sarda crossbred dairy goats were divided into three groups, which were orally administered 0 (control group; CON), 0.45 (low iodine group; LI) or 0.90 (high iodine group; HI) mg of KI/day, respectively. The daily dose of KI (76.5% of iodine) was administered as salt dissolved in water for 8 weeks. Plasma contents of nonesterified fatty acids (NEFA), urea, glucose, insulin, free triiodothyronine (FT 3 ) and thyroxine (FT 4 ) were determined weekly. Iodine supplementation increased significantly the FT 3 hormone ( P 5 0.007) and FT 3 /FT 4 ratio ( P 5 0.001) and tended to influence the FT 4 hormone ( P 5 0.059). An iodine level 3 week of sampling interaction for NEFA ( P 5 0.013) evidenced a temporary concentration increase in supplemented groups. The 'Revised Quantitative Insulin Sensitivity Check Index' increased with KI supplementation ( P < 0.01). Blood urea nitrogen (BUN) and insulin were lowered ( P < 0.01) by iodine supplementation (groups LI and HI; P < 0.01). The glucose concentration evidenced an iodine level 3 week of sampling interaction ( P 5 0.025) due to an unexpected and temporary increase of its concentration in the CON group. Glucose concentration was decreased by KI supplementation only in LI group ( P , 0.05). In conclusion, the daily supplementation of low doses of KI can improve insulin sensitivity and decrease BUN in dairy goats.

Nutritional Studies on Some Different Sources and Levels of Iodine on Productive Performance, Ruminal Fermentation and Blood Constituents of Buffalo. 3-Effect of Different Levels of Iodine on Productive Performance of Buffalo Calves.

“…Deferens in BUN could be due to increase thyroid hormone in treated buffaloes which in turn result in a slight increase in protein catabolism. These results are in accordance with Nudda et al (2013) who found that BUN was significantly lower by iodine supplementation. Previous observations Pattanaik et al (2001) reported that a greater retention of absorbed nitrogen in iodine-supplemented goats were observed.…”

“…Pattanaik et al (2004) found that serum triiodothyronine concentration was similar between the groups, I supplementation increased (P<0.01) serum thyroxine from 21.43 to 29.72 ng ml. Nudda et al (2013) found that the T3 and T4 serum concentration was higher (P<0.01) in HI than in LI. The T4 serum concentration tended to be higher (P=0.059) in blood animals fed high level HI than in LI.…”

“…Also, Bedi et al (2000) reported that serum glucose level was significantly (P<0.01) in goats by using level of KI. Nudda et al (2013) found that serum glucose concentration was higher in high level than in low level of iodine addition. On the other hand, Pattanaik et al (2004) found that serum glucose concentration was not affected by the I supplementation.…”

Suplementación vitamínica y mineral como estrategia para reducir la incidencia de cetosis bovina en el trópico bajo

“…En T2 se suministró un suplemento a base de yodo, donde el mejor comportamiento de este grupo en comparación con el grupo control frente a la movilización de lípidos, puede haberse dado porque el yodo es un mineral esencial que participa en la formación de las hormonas tiroideas (triyodotironina y tiroxina), las cuales a su vez, actúan en la regulación de diferentes procesos en el organismo, como son el metabolismo basal, la glucogénolisis, la gluconeogénesis, el metabolismo de lípidos, metabolismo de proteínas, y en la lactogénesis (NUDDA et al, 2013;SAMANC et al, 2010). Se considera que el aporte adicional de yodo pudo haber estimulado una mayor formación de hormonas tiroideas con lo que se favoreció la regulación fisiológica del animal en una etapa de diferentes cambios metabólicos y nutricionales.…”

Effectiveness of High Input Feeding System in Relation to Growth and Carcass Quality of Various Classes of Beetal Kids

“…Average daily gain (Kadim et al, 2003), feed conversion ratio (Sen et al, 2004) and Kleiber ratio (Mohammadi et al, 2010) were calculated at the end of the trial. Blood samples were collected at day one and at the end of the fattening period for determining serum glucose, serum creatinine, blood urea nitrogen (BUN) and cholesterol to know the physiological response in treatment groups (Nudda et al, 2013). The fattening ration and minced meat sample were analyzed by proximate analyses procedures detailed out by AOAC (2003) for determining the detail chemical composition at Institute of Animal Nutrition and Feed Technology (IAN&FT), UAF.…”